Cortical depth dependent population receptive field attraction by spatial attention in human V1

TY - JOUR

T1 - Cortical depth dependent population receptive field attraction by spatial attention in human V1

AU - Klein, Barrie P

AU - Fracasso, A.

AU - van Dijk, Jelle A

AU - Paffen, Chris L E

AU - Te Pas, Susan F

AU - Dumoulin, Serge O

N1 - Copyright © 2018. Published by Elsevier Inc.

PY - 2018

Y1 - 2018

N2 - Visual spatial attention concentrates neural resources at the attended location. Recently, we demonstrated that voluntary spatial attention attracts population receptive fields (pRFs) toward its location throughout the visual hierarchy. Theoretically, both a feed forward or feedback mechanism could underlie pRF attraction in a given cortical area. Here, we use sub-millimeter ultra-high field functional MRI to measure pRF attraction across cortical depth and assess the contribution of feed forward and feedback signals to pRF attraction. In line with previous findings, we find consistent attraction of pRFs with voluntary spatial attention in V1. When assessed as a function of cortical depth, we find pRF attraction in every cortical portion (deep, center and superficial), although the attraction is strongest in deep cortical portions (near the gray-white matter boundary). Following the organization of feed forward and feedback processing across V1, we speculate that a mixture of feed forward and feedback processing underlies pRF attraction in V1. Specifically, we propose that feedback processing contributes to the pRF attraction in deep cortical portions.

AB - Visual spatial attention concentrates neural resources at the attended location. Recently, we demonstrated that voluntary spatial attention attracts population receptive fields (pRFs) toward its location throughout the visual hierarchy. Theoretically, both a feed forward or feedback mechanism could underlie pRF attraction in a given cortical area. Here, we use sub-millimeter ultra-high field functional MRI to measure pRF attraction across cortical depth and assess the contribution of feed forward and feedback signals to pRF attraction. In line with previous findings, we find consistent attraction of pRFs with voluntary spatial attention in V1. When assessed as a function of cortical depth, we find pRF attraction in every cortical portion (deep, center and superficial), although the attraction is strongest in deep cortical portions (near the gray-white matter boundary). Following the organization of feed forward and feedback processing across V1, we speculate that a mixture of feed forward and feedback processing underlies pRF attraction in V1. Specifically, we propose that feedback processing contributes to the pRF attraction in deep cortical portions.

KW - Journal Article

U2 - 10.1016/j.neuroimage.2018.04.055

DO - 10.1016/j.neuroimage.2018.04.055

M3 - Article

C2 - 29709626

SN - 1053-8119

VL - 176

SP - 301

EP - 312

JO - NeuroImage

JF - NeuroImage

ER -